was abandonned at this point. There is not enough new development in trunk
to justify version 1.20, and what there is has seen quite a lot of test
(mostly the code refactoring necessitated by the optional "update only ext
attr metadata" feature). OTOH the python3 code needs to come out to support
the new Unity scope, and I was too lazy to merge it the 19 branch (also a
bit too much mod for a "maintenance" branch). So what would have been
1.20.0 comes out as 1.19.10, on the trunk.
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